Simplify Js::Method class.

      # Detects various properties of a method from AST node and

      # returns a documentation hash with these and method name.

      def detect(name, ast)

        if proper_function?(ast)

          return {

            :tagname => :method,

            :name => name,

          :params => empty_array_to_nil(make_params(ast)),

            :params => arr_to_nil(params(ast)),

            :chainable => chainable?(ast) && name != "constructor",

          :fires => empty_array_to_nil(detect_fires(ast)),

          :method_calls => empty_array_to_nil(detect_method_calls(ast)),

            :fires => arr_to_nil(fires(ast)),

            :method_calls => arr_to_nil(method_calls(ast)),

          }

        else

          return {

            :tagname => :method,

            :name => name,

          }

        end

      end

      private

      def empty_array_to_nil(arr)

      def proper_function?(ast)

        ast.function? && !ast.ext_empty_fn?

      end

      # replaces empty array with nil

      def arr_to_nil(arr)

        arr.length == 0 ? nil : arr

      end

      def make_params(ast)

        if proper_function?(ast)

      def params(ast)

        ast["params"].map {|p| {:name => p.to_s} }

        else

          []

        end

      end

      def chainable?(ast)

        if proper_function?(ast)

        Js::Returns.chainable?(ast.raw)

        else

          false

        end

      end

      def detect_fires(ast)

        if proper_function?(ast)

      def fires(ast)

        Js::Fires.detect(ast)

        else

          []

        end

      end

      def detect_method_calls(ast)

        if proper_function?(ast)

      def method_calls(ast)

        Js::MethodCalls.detect(ast)

        else

          []

        end

      end

      def proper_function?(ast)

        ast.function? && !ast.ext_empty_fn?

      end

    end